EP 1259959 B1 20040107 - COPY-PROTECTED OPTICAL DISC AND METHOD FOR PROTECTING SAME
Title (en)
COPY-PROTECTED OPTICAL DISC AND METHOD FOR PROTECTING SAME
Title (de)
KOPIERGESCHÜTZTE OPTISCHE PLATTE UND SCHUTZVERFAHREN FÜR EINE SOLCHE PLATTE
Title (fr)
DISQUE OPTIQUE PROTEGE CONTRE LA COPIE ET PROCEDE DE PROTECTION POUR UN TEL DISQUE
Publication
Application
Priority
- FR 0100344 W 20010206
- FR 0002042 A 20000211
Abstract (en)
[origin: WO0159774A1] The invention concerns a copy-protected disc and a method for protecting such a disc. The disc comprises a main spiral track (1) and a secondary track (2) interposed partly between the turns of the main track. The sectors of the secondary track and those opposite the main track bear the same addresses (A to A+Q) and comprise a characteristic identifier of the track where they are located. The inventive method consists in identifying said structure by a series of readings of the sectors of the protective zone (A to A+Q) starting from the addresses respectively before and after said zone. The invention is applicable to discs such as CD-ROM or DVD-ROM protected against piracy.
IPC 1-7
IPC 8 full level
G11B 20/10 (2006.01); G11B 7/007 (2006.01); G11B 20/12 (2006.01); G11B 23/28 (2006.01); G11B 20/00 (2006.01)
CPC (source: EP KR US)
G11B 7/007 (2013.01 - EP KR US); G11B 23/284 (2013.01 - EP US); G11B 20/00086 (2013.01 - EP US); G11B 20/00586 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0159774 A1 20010816; AT E257617 T1 20040115; AU 3561301 A 20010820; CA 2398701 A1 20010816; DE 60101731 D1 20040212; DE 60101731 T2 20041007; EP 1259959 A1 20021127; EP 1259959 B1 20040107; FR 2805071 A1 20010817; FR 2805071 B1 20020503; JP 2003523038 A 20030729; KR 20020087052 A 20021121; US 2001024411 A1 20010927; US 6738331 B2 20040518
DOCDB simple family (application)
FR 0100344 W 20010206; AT 01907710 T 20010206; AU 3561301 A 20010206; CA 2398701 A 20010206; DE 60101731 T 20010206; EP 01907710 A 20010206; FR 0002042 A 20000211; JP 2001559011 A 20010206; KR 20027010318 A 20020809; US 77960601 A 20010209